Bump @angular/material from 13.3.0 to 13.3.1 in /frontend

Bumps [@angular/material](https://github.com/angular/components) from 13.3.0 to 13.3.1.
- [Release notes](https://github.com/angular/components/releases)
- [Changelog](https://github.com/angular/components/blob/master/CHANGELOG.md)
- [Commits](https://github.com/angular/components/compare/13.3.0...13.3.1)

---
updated-dependencies:
- dependency-name: "@angular/material"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

frontend/package.json

@@ -16,7 +16,7 @@
     "@angular/compiler": "~13.2.0",
     "@angular/core": "~13.2.0",
     "@angular/forms": "~13.2.0",
-    "@angular/material": "^13.3.0",
+    "@angular/material": "^13.3.1",
     "@angular/platform-browser": "~13.2.0",
     "@angular/platform-browser-dynamic": "~13.2.0",
     "@angular/router": "~13.2.0",